ADDENDUM
Addendum Group is a software development company that focuses on technology-agnostic solutions to help businesses with digital product development and transformation.
Company facts
- Founded
- 2009
- Headquarters
- United States
- CEO
- Edvardas Jatautas
About
Addendum is a company that specializes in software development, serving as a reliable partner in technology for various businesses. We focus on delivering high-quality digital product development that is tailored to meet the specific needs of our clients. As experts in this field, we pride ourselves on being technology-agnostic, which allows us to select the most appropriate tools and technologies for each project, ensuring optimal outcomes. Our core services include enterprise software development, team augmentation, quality assurance, IT support and maintenance, as well as data management, data strategy, and business intelligence services. We strive to support our clients in navigating the digital transformation landscape, helping them to leverage technology effectively to enhance their business operations. With an emphasis on teamwork, we offer remote, onsite, or blended team solutions, ensuring that we adapt to the working preferences of our clients while maintaining the highest standards of service and support.
Open positions
Front-end Developer
Front-end developer building and modernising interactive, accessible user interfaces for information systems and registries, integrating them with backend services via APIs. Remote anywhere in Lithuania; the framework varies by project across React, Angular, or Vue with a UX and accessibility focus.
UI/UX Design Specialist
UI/UX Design Specialist at ADDENDUM designs and improves business applications: building design systems, Figma prototypes and user journeys, and running user research (interviews, surveys, workshops) with stakeholders and dev teams. Remote role, but you must be located in Lithuania.
Senior Software Developer (Java / Kotlin)
Senior backend developer at ADDENDUM, an IT team-augmentation firm, working on a securities trading automation project in the banking sector: designing and delivering Java/Kotlin + Spring Boot backend services, REST APIs, system integrations, and SQL optimisation. Hybrid role in Vilnius; candidates must already be based there.
Senior Software Engineer (Java / Kotlin)
Senior backend engineer at ADDENDUM, a team-augmentation firm, working on a securities trading automation project in banking in Tallinn (hybrid, must be based there). Day to day: designing and building Java/Kotlin + Spring Boot services, REST APIs, system integrations, and SQL database work to automate trading and settlement.
Data Quality Engineer
ABOUT THE COMPANY: Join ADDENDUM, a global software development and IT team augmentation firm focusing on fintech, banking, and telco industries. Experience tailored benefits, diverse projects with various tech stacks,…
Business Development Partner (US Market)
ABOUT THE COMPANY: Join ADDENDUM, a global software development and IT team augmentation firm focusing on fintech, banking, and telco industries. Experience tailored benefits, diverse projects with various tech stacks,…
Data Analyst
Data analyst at ADDENDUM, an IT team-augmentation firm, based in Vilnius and working with a retail-sector team: analyzing data, defining and monitoring business/project KPIs, supporting budgeting and cost control, and producing reports and data-driven insights. Core tools are MS Excel and Power BI, with SQL or Python as a plus.
Senior Data Engineer
Senior Data Engineer at ADDENDUM (IT team augmentation firm) in Vilnius, joining a retail-sector project team. Day to day: designing data and semantic models, building ETL/ELT pipelines and DAGs with Airflow/Cloud Composer and Dataflow, integrating APIs and third-party systems, and optimizing BigQuery queries and cloud costs.
QA Automation Engineer
Designs and maintains automated test scripts for functional, regression, and performance testing in fintech systems, ensuring compliance and quality while collaborating in a Scrum environment.
QA Engineer
QA Engineer tests telco and fintech applications, designs test strategies, and coordinates with dev teams to resolve issues and ensure software quality.